Sounds like a ton of fun. There are probably a few online message boards that would have a ton of information on that. Here's one at Cruise Critic.com
More specifically, this link here shows the most relevant board: Honeymoon & Wedding Cruises - Cruise Critic Message Boards

Good luck in your search.

__________________

I dreamed of a wedding of elaborate elegance,
A church filled with family and friends.
I asked him what kind of a wedding he wished for,
He said one that would make me his wife.
~Author Unknown